Tadalafil (Cialis)

Tadalafil (Cialis) is a phosphodiesterase-5 inhibitor that is used to treat impotence. It is manufactured by Eli Lilly & Co. Ltd. The standard dose is 10mg at least 30 minutes before sexual activity.

Tadalafil’s side-effects include headaches, facial flushing, indigestion, nasal congestion, transient disturbance of colour vision and raised blood pressure as well as back and muscle pain. Nitrates, including amyl nitrites (poppers) should not be used with tadalafil.

A reduced dose should also be used in patients taking protease inhibitors. The manufacturer recommends that patients taking protease inhibitors take no more than 10mg tadalafil, and not more than once in every 72 hours. Non-nucleoside reverse transcriptase inhibitors (NNRTIs) are expected to reduce levels of tadalfil.

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This content was checked for accuracy at the time it was written. It may have been superseded by more recent developments. NAM recommends checking whether this is the most current information when making decisions that may affect your health.